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Further electron spin resonance studies of the pyrolysis of aromatic hydrocarbons

โœ Scribed by L.C. Lewis; L.S. Singer

Publisher
Elsevier Science
Year
1967
Tongue
English
Weight
624 KB
Volume
5
Category
Article
ISSN
0008-6223

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โœฆ Synopsis

Electron spin resonance studies of the pyrolysis of aromatic hydrocarbons in liquid media have been continued. The method applied previously to the compound acenaphthylene has been extended to additional aromatic hydrocarbon systems including 9,9'-bifluorene, Ag,9'-bifluorene, periflanthene, and derivatives of anthracene. Hydrocarbon concentration and temperature of measurement were important factors in obtaining the resolved proton hyperfine spectra needed to identify the radical intermediates. The role of these intermediates in the initial reactions of carbonization has been clarified by additional chemical studies.

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An electron spin resonance study of the
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Electron spin resonance measurements have been made on carbonized acenapllthylene in the pure state and in solutions in inert liquids. Well-resolved nuclear hyperfine structure is observed in the liquid solutions, Isotopic substitution csperiments proye that nuclear hyperfine intcructiorl is the mai

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## ABSTRACTS above 650"HTT, and no resonance reappearing above that (checked up to 1600ยฐC). The temperature dependence is for PVC exactly Curie type, so is also for the sugar chars, however, with a deviation gradually showing up above HTT of 700ยฐC. It is believed that this deviation is due to incr